One other thing to remember. I have an engineering background and spent a life time dealing with items in the trans sonic speed range. This can drive a man to drink. I pattern probably too much. I had a friend that I used to hunt ducks, geese and cranes with. We both shot 12ga SBEs. I used to tell him not to used 3 1/2 Ts in his SBE because the patterns would fall apart. He nodded his head and went ahead shooting the Ts. He consistently out shot me. It goes back to an old English axiom: A poor pattern on target kills better then a good pattern off.
What we have here is an unruly projectile flying at trans sonic speeds fired by a human being. This gets into the math of chaos realm and science is not yet ready to crack a problem with this many variables. Pattern, shoot what works for you, do what comes natural and don't waste time thinking about it.
